Vaxve mechanism



C. W. STEVENS VALVE ucmmrsn Nov. 3, 1931.

Original'r'ileu Nov. 27. 1926 46 amm m CHARLES W.STEVENS Reuma Nov, 3.',1931

. v cinemas s'rEvl-.Ns'or coLUmiUs, omo

VALVE IMZEJ'HASN'IBE` originali. 1,715,176, datei The object of'this invention is provide -an'iniproved valve adapted to various uses,"

with respect to its seat by the same device that is used to turn it. I

vThe invention is embodied in the example herein shown and described, the features ofnovelty'beingV finally claimed.

In the accompanying dra.wings--` Figure 1 is mainly-'a vertical section with' some parts in full showing a valve according to the invention, y

Fig. 2 is a side view of the plug with a cani plate thereon in section on theline 11-11 ig. 4. y Fig. 3 is a plan view of the upper end of .20 the plug with the'cam platefremoved.

Fig. 4 is a plan view'of the upper end of .the plug withthe cam plate thereon and a portion in section. Y

Fig. 5 is a plan view of the lower sideof the housing. i f

Fig,` 6 is a view in side elevation ofthe plug-operating stem tand the plug asseiibled.

Fig. 7 is an edge view of the raising and lowering cani.

In the views 10 designates a valve body or casing containingvthe valve seat.' 11 des-v ignates the valve or -plug which has a stem 12 with a narrow longitudinal lug 13 thereon l spacedat itslower end from the top of the plug, and two wide longitudinal lugs 14 and 1 5 that extend tothe top of the plug. The upper end of the stem ofthe plug is threaded to receive a curved cam 16 that has two low points and two-high points said cam being w The upper end ofl'thecage 21formsa shoulfixed in osition onsaid thread bya set-screw der having a bearing to prevent the stem' and cage from movlng upward while the lower end of the cage turns on a cam plate 24. The cam plate 24 is seated on the top of the valve body casingand has two lugs 25, 25, that engage recesses 26,26, in the housing so that when the housing is secured vto the casing the cam plate is locked-in fixed position. The cam plate scentrall encircle the stem of the plug andv lp on but has an 'internal lug 27 to function` as hereinafterexplained.` The cam plate 24 has a track cam 28 having its major portion, 'as between the points 'a-b, at one side colleentric with the axis of the cam plate and the `stem of the plug while the smaller opposite nay 2s, 192e, serial No. 151.202, mei mumbaiav, im. applicati@ for reissue led Hay 6, 1930. Serial Io. 450,267.

ierced to ugs theref portion thereof between said pointsw-l-b lis deflected inward or inset with lrespect to the axis ofthe plate as'shown. 29 designates' a grooved wheel travelling on the .cam track said grooved wheel havingiixedthereon a. j horizontal axle 30 fittin in a horizontal hole in the lower Wall of t e cage., When the cage is rotated on the stem of. thev plug the cain track causes the axle 30 to reciprocate in its bearing, and when the grooved roller arrives at the inwardly deflected .portion of the cam t'rack the end of the axle is projected beyond the innerside ofthe wall of the lower end of the cage. When so proected the inner'end of the axle serves as a lug to engage one or the otherof the wide lugs 14 or 15 ac-` cording to the directionthe cage is turned.

The' operation is this: Assuming that l the valve is in seated o n osition and it is desired to close the v ve, t e plug operating stem is ,turned inv clockwise drection, Y the lugs 22 and 23 passing along the cam 16 force the k'plug u ward to raised vposition without turning t e plug -because the lug 27 is engaged with narrowlug l13. At the point a on the track-cam the plug is in its highest.l

v position and upon continued rotation ofthey cage allowing the lug 13 -to pass over internal lug 27. At the int a on the track cam wheel '29, with its ax e, starts inward into p0- sition tofengage lug 14 thi'sonnecting cage 21 with the plug.. Throu the inset portion of thetrack cam afs-b plug is turntd` to its closing position but still elevated.

Vpug and" lugs f4: Plug" point b the track-caindraws the wheel 29, I

with its axle outward Vthus disengaging the Y Vcage 21 from the-plug. At this osition lug Y 14 is agains'; internal lug 27 .there y reventing the plug fromturning farther. helplug operating stem is further turned in the c oekwise direction thereby causing the lugs 22 and 23 of the cage21to ride on cam 16 thereby forcing'the plug down into its seat in closed '1 position. To turn `the plug to open position Y again the operation is reversed but in this operation-the 'projected axle of wheel 29 Vengages the stem lug 15, and the said lug storeagainst internal lug 27.

forms of the parts can be changed without departingV from the gist of the invention as claimed. Y Y

What I claim is: 1. In a valve mechanism, a casing-*having seat, a plug therefor adapted.` to be Y m and lowered to either of two Y dierent positions'in said seat, said plug hav- Y ing a stem provided with a longitudinal lug` Y at its lower end from t e top of the longitudinal] spaced from the first mentioned lug exten f ing below said longitudinal' lug, thereby forming a U-shaped recess and a longitudinal recess opposite said longitudinal lug, a cam member secured to the upper endof'said stem, a stationary late on saidcasing havingt a cam track and a ug'entering said U-shape recess to 'tively lockv the plug from rota? tion in ei er of itsflowered positions and release the same for rotation'in its raised s'i` plug-operating member ournaled above e casi and carrying a sliding pin 'actuated by sai cam track to project said infn said longitudinal recess to cause 4 therotation of the plug when the plug is Y raised from its seat, said plug operating memberalsocarryinglugstoacton said cam member of the stem and a stationar of a cam for 'rection to and Y 4. Infa valve-plug.mechanism, a casing having a lug seat, a lug therefor adapted to i be move in an axia direction from and to eitherof two positions withrespect to said seat, a single rotatable plug operating device having means thereon for moving t e plug in an axial direction and' means actuated by said plug operating device for restraining the plug from rotary motion while it-is being moved axially.v n f `.V

5. In a valve plugmechanisima casing having a plug seat, a plu therefor adapted to be moved in an axial 'direction from and to leither of' two positions with respect to saidi seat, ajrotatable plug operating stem and means thereon consistm of a cam for movsaid seat, means for restraining the vplu vfrom rotary motion while moved axial y, and

means for rotating said plug including-a pin actuated by said rotatable plug operating cam en ng said pin. SCI-IAR W. TEVENS.

to raise and lower the l.

ing the plug in an axial 'rection to and froml llo rection from and' i plug fromrotary motion while .itis'being movedaxially,Y Y p 55 '3; In a valve plug mechanism, a casin havingapl seat`,apl thereforadap j ero twoposi'onswi -Y tosai seat, a rotatableplugoperating. steinv and formoving'the plug-in an be iiiovedmV an axial meansthereon Y axialdirectiontoand fromsaid seatbyro- V tation of theplugo Y ting steinin one di- 'on and. means or restraining ytheV plug .7' m'yunotion whileitmisr beingv moved ISQ 

